cc: Split RasterTilePriorityQueue into required and all based on type.

cc/resources/tile_manager.h

Index: cc/resources/tile_manager.h
diff --git a/cc/resources/tile_manager.h b/cc/resources/tile_manager.h
index e93373af653e44f5db4b82b7e3e56639e8e62ecc..e26470b9dbb497fac93a09be3f0d454d0b41a004 100644
--- a/cc/resources/tile_manager.h
+++ b/cc/resources/tile_manager.h
@@ -60,13 +60,14 @@ class CC_EXPORT TileManagerClient {
   // Given an empty raster tile priority queue, this will build a priority queue
   // that will return tiles in order in which they should be rasterized.
   // Note if the queue was previous built, Reset must be called on it.
-  virtual void BuildRasterQueue(RasterTilePriorityQueue* queue,
-                                TreePriority tree_priority,
-                                RasterTilePriorityQueue::Type type) = 0;
+  virtual scoped_ptr<RasterTilePriorityQueue> BuildRasterQueue(
+      TreePriority tree_priority,
+      RasterTilePriorityQueue::Type type) = 0;
 
   // Given an empty eviction tile priority queue, this will build a priority
   // queue that will return tiles in order in which they should be evicted.
   // Note if the queue was previous built, Reset must be called on it.
+  // TODO(vmpstr): Change this to scoped_ptr<EvictionQueue> Build...
   virtual void BuildEvictionQueue(EvictionTilePriorityQueue* queue,
                                   TreePriority tree_priority) = 0;